package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@Slf4j
@RequestMapping("/shoppingCart")
@RestController
public class ShoppingCartController {
    @Autowired
    private ShoppingCartService shoppingCartService;

    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart) {
        log.info("购物车数据：{}", shoppingCart);

        //设置用户id，指定是哪个购物车的用户id
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);

        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId, currentId);

        if (dishId != null) {
            //添加到购物车的是菜品
            wrapper.eq(ShoppingCart::getUserId, currentId);
        } else {
            //添加到购物车的是套餐
            wrapper.eq(ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
        }
        //查询当前菜品或者套餐是否在购物车中
        //SQL:select * from shooping_cart where user_id = ? and dish_id/setmeal_id = ?
        ShoppingCart byId = shoppingCartService.getOne(wrapper);

        if (byId != null) {
            //如果已经存在，就在原来的基础上加一
            Integer number = byId.getNumber();
            byId.setNumber(number + 1);
            shoppingCartService.updateById(byId);
        } else {
            //如果不存在， 则添加到购物车，数量默认就是一
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
        }
        return R.success(byId);
    }

    @GetMapping("/list")
    public R<java.util.List<ShoppingCart>> list() {
        log.info("查看购物车....");

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);
        return  R.success(list);
    }
    @DeleteMapping("clean")
    public R<String> clean(){
        //SQL:delete from shopping_cart where user_id = ?
        LambdaQueryWrapper <ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
        shoppingCartService.remove(queryWrapper);
        return R.success("请空购物车成功");
    }
}
